WorkflowStep.requirements_
class WorkflowStep
Optional!(Either!(InlineJavascriptRequirement, SchemaDefRequirement, DockerRequirement, SoftwareRequirement, InitialWorkDirRequirement, EnvVarRequirement, ShellCommandRequirement, ResourceRequirement, SubworkflowFeatureRequirement, ScatterFeatureRequirement, MultipleInputFeatureRequirement, StepInputExpressionRequirement)[]) requirements_;